Mill for powdering marls, bones, cement, &amp;c.



No. 687,57I. Patented Nov. 26, 190|. J. ONIDNS.

MILL FUR POWUEBING MABLS, BONES, CEMENT, SLG. (Application led Feb. 25, 1899.) (No Model.) i 3 Sheets-Sheet l.

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FIEL! mhwl, 'HHH 'Il No. 687,57l. Patented Nov. 26, |901. J. NIDNS.`

MILL FORPOWDERING MABLS, BONES, CEMENT, &c.

(Application led Feb. 25, 1899.) '(No Model.) 3 Sheets-Sheet 2.

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MILL FDR PUWYDERING MARLS, BONES, CEMENT, &c.

(Application filed Feb. 25, 1899.)

3 Sheets-Sheet 3.

(No Model.)

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. [mwen/iov( v THE NORRIS PETERS C0.' FHOTOLITND., WASHINGTON. D. Cv

section of one of my mills.

UNITED STATES PATENT OEEICE.'

JOSEPH ONIONS, OF WOLVERHAMPTON, ENGLAND.

MILL F OR POWDERING MARLS, BONES, CEMENT, Sac.

SPECIFICATION forming' part 0f Letters Patent N0. 687,571, dated November 26, 1901. Application tiled ebruary 25, 199. Serial No. 706.897. (No model.)

to ing is a specification.

My invention has for its obj ect an improved edge -runner grinding mill for grinding or powdering marl, bones', cement, slags, dac., by which the clay or other material is more 1 5 thoroughly and quickly ground and separated than heretofore, while a considerable amount of labor is saved by the arrangement of the pans, hopper, and elevator.

In order that my invention may be clearly o understood and more easily carried into practice, I have appended three sheets of drawings, upon which I have fully illustrated my said improvements.

Figure 1 is a part front elevation and part Fig. 2 is aside elevation. Fig. 3 is a plan view of the pans.

In carrying my invention into effect I provide two pans A and B, the one A being mounted to revolve by means of the gear-wheels M 3o and N and pulley P and which is provided 3' 5 the support f of the frame F and is provided with the perforations b', which are liner than those of the pan A, which is revoluble with the vertical shaft Q, as it is supported by the supporting-disk R', carried by the shaft. Sta- 4o tionary Scrapers D are provided in the pan A for directing the clay onto the ring-die S, eountersunk in the ring S', said ring-die forming the path for the rollers H. For scraping the clay over the perforations b' I employ the traveling Scrapers C, which are attached to the under side of the pan A, the coarser ma terial beingdirected tothe apertures b2, from whence it drops into the trough K and is conveyed bythe elevator R. back to the grinding-pan A. Perforations a' are provided in 5o Y the bottom of the pan A for receiving and allowing the clay to drop into the pan B. The ne clay after passing through the perforations of the pan B drops into the hopper indicated by the dotted lines'E, from whence it is brought up for use by suitable elevators. The ring S is connected to the peripheral curb or wall T by means of the arms U.

The action is as follows: The material to be ground is fed into the pan A and after being sufficiently crushed by the rollers H is scraped through the holes a' by the Scrapers D, thus falling into the pan B, where it is scraped over the smaller perforations b', so that the fine portion passes through the said perforations and drops into the hopper E in a finished state, while the rougher portions are gradually pressed through the aperture' b" and from thence are conveyed back to the' pan A.

The combination of a frame, grinding or crushing rollers revolubly mounted in said frame, a revoluble vertical shaft, a supporting-disk secured to and revoluble with said vertical shaft, a pan secured to said disk upon which the rollers rest and relatively travel, said pan comprising an inner grooved imperforate ring, a ring-die countersunk in said ring in the path of said rollers, a peripheral curb or wall, arms connected with the inner ring and supporting said curb and'leaving openings, an annular screen countersunk in the pan-bottom over said openings, sweeps or scrapers secured to the under side of thepan, and a stationary auxiliary pan mounted below the primary pan, and having a more finely perforated bottom, said scrapers being arranged to sweep the bottom of the auxiliary pan.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOSEPH ONIONS. 

